Bbake-shoe mold



Feb.19,1924. A 1,484,433

J. S. THOMPSON BRAKE SHOE MOLD Filed July 20. 1925 Patented Feb. 19,1924.

PATENT OFFICE.

JAMES S. THOMPSON, OF PELHAM, NEW YORK.

BRAKE-snor; MOLD.

Application led July 20, 1923. Serial No. 652,781.

ToaZZ whom t ymay concern.'

Be 1t known that I, JAMES S. THOMPSON,

a vcitizen of the United States, residing atv Pelham, in the county ofWestchester and State of New York, have invented certain new and usefulImprovements in Brake- Shoe Molds, of which the following is aspecification.

This invention relates tothe manufacture of brake shoes and its primaryobject is to simplify and facilitate setting up the mold for castingoperation and opening the mold to remove the brake shoe casting.`

A further object of the invention is to provide a permanent mold ofsimpleV and improved construction in which the parts to be embedded inthe casting can be easily inserted and the mold closed for the'castingoperation, and which will Permit the shoe casting to be easily removedwhen the mold is open.

And a further object of the invention is to construct a metal mold witha brake shoe cavity faced with refractory material so that the parts tobe Vembedded in the shoe can be easily inserted in the mold cavitywithout damaging the refractory facing and so that the shoe casting maybe easily removed from the mold without damaging the refractory facing.

Referring to the drawing illustrating a selected embodiment of theinvention- Fig. 1 is a transverse sectional view on the line 1-1 of Fig.2.

Fig. 2 is a longitudinal 'view on the line 2-2of Fig. 1.

Referring to the'drawings, the mold comprises a metal drag 5 and a metalcope 6 having a mold cavity 7 and a pouring gate S. The cope has anenlarged opening 9 to receive a sand plug 10 which is preferably held ina holder'll `fitting Ysnugly in the opening 9. This sand plug is formedwith a recess 12 constituting a part of the mold cavity 7 and adapted toreceive the attaching lug 13 and the baked sand core 14 to form theopening in the lug. A reinforcing back 15 is held in place snuglyagainst the top of the mold cavity by wires 16, which are engaged with across-bar 17 resting on the top of the plug and which eX- tend downthrough the plug and have their ends twisted together at 18 beneath theback. Thus the Wires suspend the back in its proper position in the moldcavity, and the back supports the lug 13 and the core 14 thereon in therecess of the plug.

The mold cavity 7 is faced with refractory material forming the wallsthereof, and this refractory material abuts against the plug so that allthe walls of the mold cavity are refractory.

The parting line'between the drag and the cope is formed by successionof steps transversely of the mold so that the side wall 19, the bottomwall 2O and the end wall 21 of the mold cavityare located on the drag,whereas the top wall 22, the side wall 23 and the end wall 24 of themold cavity are located on the cope. The walls of the recess 12 are, ofcourse, located on the cope. The drag and the cope are also divided bythe parting lines 25, 25', which form a continuation of the parting lineextending through the mold cavity walls. This construction provides forthe cope being lifted from the drag or the drag being lowered from thecope to open the mold for the removal of the finished shoe castingwithout damaging the refractory facing.

To secure the mold, the drag and the cope together I provide a yoke 26which is pivoted at 27 on one member and is provided with a set screw 28whereby it may be clamped in place when swung to closed position, asshown in the drawing.

My invention provides a permanent mold of comparatively simpleconstruction, in which the drag and the cope are constructed to interfitso that they can be supported to permit convenient removal of the shoecasting and to permit the insertion of the reinforcing back, the lug andits core in the mold cavity for another casting.

My invention can be employed for making castings other than brake shoesand I consider myself entitled to make all such changes in the form,construction andarrangement of parts as may be necessary or desirablefor this purpose, and for making different kinds, shapes and sizes ofbrake shoes, which fairly fall within the scope of the following claims.

I claim:

1. A permanent mold for making castings comprising a metal drag and ametal cope having a mold cavity therein, the bottom Wall, one side walland one end wall of Q iyieafisc the mold cavity being foi'inecl on, thedrag, and the top Wall, one side Wall and one end wall being foiinecl onthe cope.

2. A permanent mold for making castings comprising a metal drag and ametal cope having a mold cavity therein, the bottoln Wall, one side Walland one end Wall' of the mold cavity being formed on the drag, the topWall, one side Wall and one end Wall of the mold cavity being fclfmed onthe cope, and all of said Walls being faced with i'e- 3. A pern'ianentinclcl foi* making castings comprising a metal diag ancl a metal copehaving a mold cavity therein, saidl mold cavity having its Walls facedwith refractory material, and the parting' line be-Y tween the drag andthecopc extending down Ward from the top of the mold in steps throughthe molcl cavity to the bottom' of the mold. 1

parting line between the drag and the cope extending clown from the topof the nicld to a step at the tcp of one side wall and one end Wall ofthe mold cavity and thence clown to the bottom of the othei` side Walland the other end wall and tlnough the bottom of the mold.

5. A inclcl for casting a brake shoe, coinprising a metal drag and ametal cope having a mold cavity therein, the Walls of said mold cavitybeing faced With refractory Inaterial, said cope having; an openingtherein,V

a sand plug seated in said opening,` and having a recess forming a partof the mold cavity, means seated in the plug' foi` suspending the backin the mold cavity and the attaching lng and the cere foi` foiining theopening therein in the recess in the plug, the bettorn, one side Walland one end Wall of the mold cavity beangy formed 1n the drag, the

' tcp, one side Wall and one end Wall of the inold cavity being formeelin the cope, and means for securing the drag and cope to.-

gethei.

JAMES S. THOMPSON.

